usb: phy: use kzalloc to allocate struct tegra_usb_phy

Use kzalloc instead of kmalloc to allocate struct tegra_usb_phy.
This ensures that all function pointers in member u_phy are
initialized to NULL.
Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

drivers/usb/phy/tegra_usb_phy.c

@@ -740,7 +740,7 @@ struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
 	int i;
 	int err;
 
-	phy = kmalloc(sizeof(struct tegra_usb_phy), GFP_KERNEL);
+	phy = kzalloc(sizeof(struct tegra_usb_phy), GFP_KERNEL);
 	if (!phy)
 		return ERR_PTR(-ENOMEM);